eDesigner - Throws Exception can't view the project tree

I reinstalled eDesigner and when I try to open an existing project from the repository I get the following error. Can anyone help me to resolve this issue please?

java.lang.NoClassDefFoundError: com/stc/editor/javamodel/beans/NodeProviderCookieE xt
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java :539)
at org.netbeans.core.modules.JarClassLoader.defineCla ss(JarClassLoader.java:192)
at org.netbeans.core.modules.JarClassLoader.findClass InJar(JarClassLoader.java:128)
at org.netbeans.core.modules.JarClassLoader.simpleFin dClass(JarClassLoader.java:115)
at org.netbeans.core.modules.ProxyClassLoader.loadInO rder(ProxyClassLoader.java:479)
at org.netbeans.core.modules.ProxyClassLoader.smartLo adClass(ProxyClassLoader.java:452)
at org.netbeans.core.modules.ProxyClassLoader.loadCla ss(ProxyClassLoader.java:124)
at java.lang.ClassLoader.loadClass(ClassLoader.java:2 35)
at java.lang.ClassLoader.loadClassInternal(ClassLoade r.java:302)
at com.stc.collabeditor.jce.module.JCENode.<init&g t;(JCENode.java:187)
at com.stc.collabeditor.jce.module.JCELoadAction.load Element(JCELoadAction.java:79)
at com.stc.egate.gui.projectexplorer.ProjectTree.crea teProjectElementNode(ProjectTree.java:1948)
at com.stc.egate.gui.projectexplorer.ProjectTree.crea teProjectChildrenNodes(ProjectTree.java:2315)
at com.stc.egate.gui.projectexplorer.ProjectTree.open ProjectNode(ProjectTree.java:2505)
at com.stc.egate.gui.projectexplorer.ProjectTree.acce ss$1200(ProjectTree.java:109)
at com.stc.egate.gui.projectexplorer.ProjectTree$Proj ectTreeExpandListener.treeExpanded(ProjectTree.java:2838)
at javax.swing.JTree.fireTreeExpanded(JTree.java:2238 )
at javax.swing.JTree.setExpandedState(JTree.java:2999 )
at javax.swing.JTree.expandPath(JTree.java:1735)
at javax.swing.plaf.basic.BasicTreeUI.toggleExpandSta te(BasicTreeUI.java:2108)
at javax.swing.plaf.basic.BasicTreeUI.handleExpandCon trolClick(BasicTreeUI.java:2095)
at javax.swing.plaf.basic.BasicTreeUI.checkForClickIn ExpandControl(BasicTreeUI.java:2049)
at javax.swing.plaf.basic.BasicTreeUI$MouseHandler.ha ndleSelection(BasicTreeUI.java:2854)
at javax.swing.plaf.basic.BasicTreeUI$MouseHandler.mo usePressed(BasicTreeUI.java:2824)
at java.awt.AWTEventMulticaster.mousePressed(AWTEvent Multicaster.java:222)
at java.awt.AWTEventMulticaster.mousePressed(AWTEvent Multicaster.java:221)
at java.awt.AWTEventMulticaster.mousePressed(AWTEvent Multicaster.java:221)
at java.awt.AWTEventMulticaster.mousePressed(AWTEvent Multicaster.java:221)
at java.awt.AWTEventMulticaster.mousePressed(AWTEvent Multicaster.java:221)
at java.awt.Component.processMouseEvent(Component.jav a:5097)
at java.awt.Component.processEvent(Component.java:489 7)
at java.awt.Container.processEvent(Container.java:156 9)
at java.awt.Component.dispatchEventImpl(Component.jav a:3615)
at java.awt.Container.dispatchEventImpl(Container.jav a:1627)
at java.awt.Component.dispatchEvent(Component.java:34 77)
at java.awt.LightweightDispatcher.retargetMouseEvent( Container.java:3483)
at java.awt.LightweightDispatcher.processMouseEvent(C ontainer.java:3195)
at java.awt.LightweightDispatcher.dispatchEvent(Conta iner.java:3128)
at java.awt.Container.dispatchEventImpl(Container.jav a:1613)
at java.awt.Window.dispatchEventImpl(Window.java:1606 )
at java.awt.Component.dispatchEvent(Component.java:34 77)
[catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java: 480)
at java.awt.EventDispatchThread.pumpOneEventForHierar chy(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForHierarch y(EventDispatchThread.java:151)
at java.awt.EventDispatchThread.pumpEvents(EventDispa tchThread.java:145)
at java.awt.EventDispatchThread.pumpEvents(EventDispa tchThread.java:137)
at java.awt.EventDispatchThread.run(EventDispatchThre ad.java:100)

Follow up with support to make sure you have the right JDK installed and you are referencing it correctly in your path. The jdk folder which came with eDesigner, has the JDK below installed. Keep in mind, we are on JCAPS 5.1.3 U4. Also, per John’s comments below, please make sure JDK 1.6 is supported by support before updating the JRE to that version.

Even that version on the jdk has security flaws. I thought that JCAPS
5.x had jdk 1.5 and that JCAPS 6.X had jdk 1.6 but I could be wrong.
Oracle has released the eGate SRE with jdk 1.6. We use ICAN 5.0.5 and
they say it is not compliant with jdk 1.6.
However there are procedures available to do minor upgrades. If you are
using 1.4.2 then you can upgrade to the latest version that is
certified. At this time that is 1.4.2_28. I believe that you have to be
a premiere support customer to continue to use these old versions.
Oracle has Java for Business where they supply updates if you have
premiere support.
I agree that you must follow the directions from support so that the
registry, logicalhost, and eDesigner components are all upgraded
properly.
John